System for cooling an electronic image assembly with a heat exchanger having internal fans

Abstract

A system for cooling an electronic image assembly using a heat exchanger with an internal fan assembly. Circulating gas may also be used to cool a front portion of the electronic image assembly or any other internal cavity of the electronic display housing. The circulating gas may be drawn through a heat exchanger so that heat may be transferred to an ambient gas. The heat exchanger may have an internal fan assembly for drawing ambient air through the heat exchanger and exhausting it out of the display housing. The heat exchanger may be divided into two portions so that the fan assembly is placed between the two portions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a non-provisional of U.S. Application No. 61 / 331,340 filed May 4, 2010 and is hereby incorporated by reference as if fully cited herein. This application is a continuation in part of U.S. application Ser. No. 12 / 905,704 filed Oct. 15, 2010 which is a non-provisional of U.S. No. 61 / 252,295 filed Oct. 16, 2009 each of which is hereby incorporated by reference as if fully cited herein This application is a continuation in part of U.S. application Ser. No. 12 / 641,468 filed Dec. 18, 2009 which is a non-provisional of U.S. Application No. 61 / 138,736 filed Dec. 18, 2008 each of which is hereby incorporated by reference as if fully cited herein. This application is a continuation-in-part of U.S. application Ser. No. 12 / 556,029 filed Sep. 9, 2009, which is a non-provisional application of U.S. provisional application No. 61 / 095,615 filed Sep. 9, 2008 each of which is hereby incorporated by reference as if fully cited herein. Th...

AI Technical Summary

Benefits of technology

The patent describes a cooling system for electronic displays using circulating gas and ambient gas. The circulating gas cools the front of the display and the backlight cavity of a LCD, while the ambient gas helps reduce noise emissions. The fans that drive the gas are placed within the heat exchanger to muffle the noise. The patent also discusses the importance of ingesting ambient gas from the edges of the display to ensure even cooling. The manifolds help distribute the ambient gas evenly across the display, reducing hot spots. The technical effects of the patent include improved cooling performance and reduced noise for electronic displays.

Problems solved by technology

When surrounding temperatures rise, the cooling of the internal display components can become even more difficult.

In order to produce this level of brightness, illumination devices and electronic displays may produce a relatively large amount of heat.

Still further, in some situations radiative heat transfer from the sun through a front display surface can also become a source of heat.

Furthermore, the market is demanding larger screen sizes for displays.

However, previous designs for moving the gas through the display have been found to generate an undesirable amount of noise emission from the display as well as thermal gradients where portions of the display were cooled but others remained warm.

While desirable, it was thought that the front surface of the backlight could not be cooled for fear that the backlight cavity would become contaminated with dust, dirt, or other particulate.

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